noun clam·shell \ˈklam-ˌshel\

Definition of clamshell

  1. 1 :  the shell of a clam

  2. 2a :  a bucket or grapple (as on a dredge) having two hinged jawsb :  an excavating machine having a clamshellc :  either of a pair of doors (as in an airplane tail) that open out and away from each otherd :  a hinged container, case, or cover that opens like the shell of a clam

Circa 1520

First Known Use of clamshell

circa 1520

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